JP2014096972A - Cable removing method and removing tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable removing method with which a cable to be removed can be confirmed at low cost, surely and easily even within piping and at a penetrating spot of a partition wall or the like, and a removing tool.SOLUTION: A method for removing a removal object cable from among a plurality of cables being disposed includes the steps of: passing an identification ring 1 from one end of a removal object cable 5a to the outer circumference of the cable 5a; supporting and moving the identification ring 1 along the removal object cable 5a; passing an insertion tool 2 from one end of piping 8 to the other end at a spot where the cable is inserted through the piping 8; mounting an identification loop 3 formed from a string or a rope to a distal end of the insertion tool 2; pulling the identification loop 3 from one end of the piping 8 by inserting the insertion tool wound around the outer circumference of the removal object cable 5a into the piping 8; and determining the cable 5 around which the identification loop 3 passed through the piping 8 is wound, as the removal object cable 5a.

Description

The present invention relates to a method for removing a cable such as a high-voltage cable in a common groove or a long distance in a building, and a removal tool used for the method.

Conventionally, as shown in FIG. 11, a high-voltage cable 50 is placed on a cable rack 51 provided along an outdoor common groove, a ceiling, a wall, or the like in a building, or as shown in FIG. 52 is inserted through the partition wall 53 or wired. As shown in FIG. 13, the cables 50 placed on the cable rack 51 are in a state where a plurality of cables 50 are stacked like a mountain, and the plurality of cables 50 may be entangled in the middle. This is the same also in the piping 52 and the penetration part of the partition 53.

In this removal method, the cable is removed while being cut at appropriate intervals from one end of the cable disposed over a long distance to the other end. However, some of these wired cables carry high-voltage electricity, and if these live wires are cut by mistake, the building will be out of power and cause a serious problem. Moreover, when an operator touches the cut live wire, an electric shock accident may occur. Therefore, first, before removal, it is extremely important to check which cable is the target cable from among a large number of cables arranged over a long distance.

As a confirmation method of these removed cables, there is a push-pull confirmation first. This is because one worker pulls one end of the cable to be removed, and the other worker at the other end of the cable away from the one end identifies the moving cable and confirms the moving cable as the cable to be removed. To do.

In this case, the cable at the other end is judged as the cable to be removed, but if many cables are tangled in the middle, another cable may have moved, and the moved cable is not necessarily I don't know if it was a cable pulled at one end, that is, a cable to be removed.

There is also a marking confirmation method. This is a process of marking from the end of the cable to be removed, and it takes time to unravel and mark the cable entangled parts, and it cannot be used in the pipes or through the partition walls. .

In addition, there is a method for checking voltage detection. This is because, among many cables, the cables to be removed do not carry electricity, so the cables that are not conducting electricity are checked. However, this voltage detection only shows that the cable does not carry electricity, and if multiple cables do not carry electricity, it can be determined which of the many cables to remove in the middle of the wiring. There is a risk of disappearing. In addition, there are cases where voltage detection cannot be confirmed with high-voltage cables or shielded cables.

There is also a confirmation method using a line checker. This is a method of confirming the corresponding cable using a wiring probe, and can be confirmed reliably, but the probe is expensive and difficult to obtain. In addition, the exploration range is limited to approximately 1 km. Furthermore, in cable removal, the removal cable is cut at regular intervals, but it cannot be used during cable removal due to the operating principle.

Therefore, a method shown in Patent Document 1 has been developed. This is because, in the replacement work of the cable laid in the tray or the like, the ring-shaped identification member is removed by passing the ring-shaped identification member from one end of the replacement target cable specified by the existing identification member. By moving along the replacement target cable, it is possible to perform the operation while always confirming visually that the cable is a replacement target cable during the removal operation.

JP 2001-251718 A

However, the thing of the said patent document 1 confirms a removal cable before and behind a wall using a commercially available cable probe, when the cable to remove passes through the penetration pipe part of a partition wall. Therefore, since the cable probe is used, there is a disadvantage that the operation cost increases.

Based on this prior art, the present invention provides a cable removal method and a removal tool that can confirm a cable to be removed inexpensively, reliably and easily even in a pipe and a through-hole such as a partition wall that are not accessible by workers. It is to provide.

The invention of claim 1 is a construction method in which a plurality of cables are arranged, the cable to be removed is confirmed, and the cable is removed while cutting the cable to be removed at a predetermined location. Then, the identification ring or loop member is passed through the outer periphery of the cable, the identification ring or loop member is supported and moved along the cable to be removed, and the worker has to insert the cable to be removed. In a pipe location or a penetration location that cannot be accessed, a wiring tool is passed from one end to the other end of the piping or penetration portion, and an identification loop made of a string or rope is attached to the tip of the wiring tool that has passed through the piping or penetration portion. Hang the identification loop around the cable to be removed, pull the wire tool from one end of the pipe or penetration, Through the Tokoro, the identification loop is determined to cable removal target cable hung, was removed method of cable.

The invention of claim 2 is the cable removal tool used for the cable removal method of claim 1 that is attached to the wire tool and the tip of the wire tool to constitute the identification loop.

According to a third aspect of the present invention, there is provided the cable removal tool according to the second aspect, wherein the wire passing tool is a rod-shaped or wire-shaped tool having a certain rigidity and flexibility.

In the invention of claim 4, the identification loop attached to the tip of the line tool is provided with hooks at both ends of a fixed length rope or string, and each loop ring provided in advance at the tip of the line tool It was set as the cable removal tool of Claim 2 or 3 attached by hanging a hook.

According to each invention of Claims 1-4, even if a removal object cable exists in many cables mounted in the cable rack, when an identification ring or a loop member is moved along the longitudinal direction of the cable, The cable to be removed is pulled by the identification ring or the loop member and pulled out to be easily confirmed visually. Moreover, since the removal object cable is drawn out in this way, it can be easily cut when the removal object cable is cut at an appropriate interval.

In addition, even when the cable to be removed is inserted together with other cables in a pipe or through location that is not accessible to workers, it is easily and reliably inserted into one end of the pipe or through location without using expensive equipment. The removal target cable can be visually confirmed from among the plurality of cables led out to the other end of the pipe or the through portion. Therefore, the confirmation work of the removal target cable can be easily and reliably performed, and the removal work can be performed safely.

In addition, in particular, in the invention of claim 4, the hooks at both ends of the identification loop rope or the string attached to the tip of the line tool can be locked to the loop-shaped ring provided at the tip of the line tool, After passing the wiring tool from one end to the other end of the pipe or penetrating part, it is easy to apply an identification loop to the cable to be removed, and the work can be performed quickly.

It is a perspective view which shows the state which the operator has confirmed the removal object cable from the some cable on the cable rack of Embodiment 1 of this invention. It is a front view of the identification ring used for Embodiment 1 of this invention. It is a perspective view which shows the state which hung the identification ring used for Embodiment 1 of this invention on the end of the cable for removal. It is a side view of the line tool and identification loop used for Embodiment 1 of this invention. It is a perspective view which shows the state which hung the identification loop on the line tool used for Embodiment 1 of this invention. It is a longitudinal cross-sectional view which shows many cables inserted in piping of Embodiment 1 of this invention. It is a longitudinal cross-sectional view which shows the state which inserted the wiring tool from the end into piping in which many cables of Embodiment 1 of this invention were penetrated. It is an expanded longitudinal cross-sectional view which shows the state which passed the wiring tool from one end of the piping in which many cables of Embodiment 1 of this invention were penetrated to the other end, and attached the identification loop to the front-end | tip of a wiring tool. . It is a longitudinal cross-sectional view which shows the state which wound the identification loop of the front-end | tip of the wiring tool passed in the piping in which many cables of Embodiment 1 of this invention were penetrated to the removal object cable at the other end of piping. . The longitudinal section which shows the state which pulled back the wiring tool which has the identification loop which wound the inside of piping in which many cables of Embodiment 1 of this invention were inserted, and was wound around the cable to be removed, and pulled out the above-mentioned identification loop to the end of piping FIG. It is sectional drawing which shows the arrangement | positioning state of the cable rack in which the cable which applies the method of this invention is mounted. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the state which the cable to which the method of this invention is applied has penetrated the inside of piping, or the partition wall, (A) figure is a side view of the state which has penetrated the inside of piping. (B) The figure is a longitudinal cross-sectional view which shows the state which the cable has penetrated the partition wall. It is a perspective view which shows the state in which the cable which applies the method of this invention is mounted in the cable rack with several other cables.

(Embodiment 1)
Embodiment 1 of the present invention will be described below with reference to the drawings.

As shown in FIG. 2, the identification ring 1 used in the method of the present invention is a ring made of resin, fiber, or metal, and has an inner diameter sufficiently larger than the thickness of one cable. As shown in FIG. 3, the identification ring 1 is used by allowing a cable to be placed on a cable rack or passing through one end outer periphery of a cable having a space on the outer periphery. The identification ring 1 is not limited to a fixed shape, and may be a loop member that forms a loop with a rope, string, or the like.

FIG. 4 shows a line tool 2 and an identification loop 3 used for a cable inserted in a pipe or a penetration portion such as a partition wall which is narrow and cannot be accessed by an operator. This wire passing tool 2 is a wire-like tool having rigidity and flexibility, and is provided with a loop-shaped ring 4 through a rope or string in a through hole at the tip. The identification loop 3 is provided with hooks 3c on both sides of a fixed length rope or string 3a via a sarcane 3b. When these two hooks 3c are hooked on the ring 4 of the wiring tool 2, an identification loop 3 is obtained.

Next, a cable removal method will be described using these tools. First, a case where a plurality of cables including a removal target cable are exposed and installed will be described. As an example, as shown in FIG. 1, when a plurality of cables 5 are mounted on a cable rack 6, as shown in FIG. 3, the identification ring 1 is hung from one end of the removal target cable 5a, The operator 7 holds the identification ring 1 in his hand and moves in the direction in which the cable 5 is laid.

At this time, even if the plurality of cables 5 are entangled and placed, if the operator 7 moves while pulling the identification ring 1, the removal target cable 5 a is pulled out from the plurality of cables 5. In this way, the removal target cable 5a can be easily and reliably confirmed by the operator 7 visually.

Further, the removal target cable 5a confirmed in this way is cut and removed by the operator 7 at appropriate intervals.

Moreover, as shown in FIG. 6, the said identification ring 1 cannot be used in the location where the some cable 5 containing the removal object cable 5a is penetrated in the piping 8. As shown in FIG.

Therefore, the wiring tool 2 and the identification loop 3 are used. As shown in FIG. 7, the wiring tool 2 is passed from one end of the pipe 8 into the pipe 8, and the tip of the wiring tool 2 is extended to the other end of the pipe 8 as shown in FIG. 8. Therefore, the loops of the identification loop 3 or the hooks 3c on both sides of the string 3a are respectively hooked on the ring 4 at the tip of the wire passing tool 2 to form a loop.

Then, as shown in FIG. 9, the identification loop 3 is hooked on the outer periphery of the removal target cable 5 a, and the wiring tool 2 is pulled from the other end of the pipe 8. The identification loop 3 may be hung on the cable 5a to be removed in a state where one hook 3c of the identification loop 3 is removed from the ring 4 at the tip of the wire tool 2, and as described above, the identification loop 3 may be hung. The hooks 3c at both ends of the loop 3 may be hung on the removal target cable 5a in a state of being hung on the wheel 4 to form a loop.

And as shown in FIG. 10, when the said identification loop 3 comes out from the end of the piping 8, it turns out that the cable 5 in which the said loop 3 is wound is the removal object cable 5a. Therefore, the removal target cable 5 a is cut at one end side of the pipe 8, and the removal target cable 5 a is extracted from the pipe 8.

Although FIGS. 7-10 demonstrated the piping 8, this becomes the same operation | work also in the penetration location of the partition wall shown in the (B) figure of FIG. Further, in the first embodiment, the identification loop 3 is provided with hooks 3c at both ends of the rope or string 3a via the sarkan 3b, and these hooks 3c are passed through the ring 4 at the tip of the wire tool 2. However, this is not always necessary, and a rope or string may be attached to the tip of the wiring tool 2 in a loop shape.

Further, in the first embodiment, as shown in FIG. 7, the wiring tool 2 is inserted from the rear end side (right side of FIG. 7) of the pipe 8 and protrudes to the front end side (left side of FIG. 7). The identification loop 3 is attached to the tip of the wiring tool 2 and the wiring tool 2 is pulled back to the rear end side of the pipe 8. The wiring tool 2 is passed through the pipe 8 from the front end side of the pipe 8 in FIG. After the tip of the line tool 2 comes out to the rear end side of the pipe 8, the identification loop 3 is attached to the rear end of the line tool 2 on the front end side of the pipe 8, and the tip of the line tool 2 is pulled. The identification loop 3 may be pulled out to the rear end side of the pipe 8.

In the first embodiment, the identification ring 1 is attached to the cable 5a to be removed from the multiple cables 5 placed on the cable rack 6, and the operator holds the identification ring 1 while holding the identification ring 1 by hand. However, instead of this, the identification ring 1 may be supported by an appropriate moving object and moved along the cable 5.

In this way, the operator removes the cable while visually confirming the removal target cable 5a using the identification ring 1 or the wiring tool 2 and the identification loop 3. In this case, a power supply, a measuring device, etc. are unnecessary, and although it is a manual operation | work of an operator, it becomes possible to remove a cable, confirming the cable for removal very safely and reliably.

DESCRIPTION OF SYMBOLS 1 Identification ring 2 Line tool 3 Identification loop 3a Rope or string 3b Sarkan 3c Hook 4 Wheel 5 Cable 5a Cable to be removed 6 Cable rack 7 Worker 8 Piping 50 Cable 51 Cable rack 52 Piping 53 Bulkhead

Claims (4)

In the method of removing the cable while confirming the cable to be removed while cutting the cable to be removed at a predetermined location while a plurality of cables are arranged,
From one end of the cable to be removed, pass the identification ring or loop member through the outer periphery of the cable, support the identification ring or loop member, move this along the cable to be removed,
At a piping location or penetration location where the cable to be removed is inserted and cannot be accessed by an operator, a wiring tool is passed from one end to the other end of the piping or penetration portion, and the wiring tool that has passed through the piping or penetration location Attach an identification loop consisting of a string or rope to the tip, hang the identification loop around the cable to be removed,
A method for removing a cable, wherein the wire tool is pulled from one end of the pipe or the penetration portion, and the cable with the identification loop that passes through the pipe or the penetration portion is determined as a removal target cable.   The cable removal tool for use in the cable removal method according to claim 1, wherein the identification loop is configured by being attached to the wiring tool and a tip of the wiring tool. The cable removal tool according to claim 2, wherein the wiring tool is a rod-shaped or wire-shaped tool having a certain rigidity and flexibility.   The identification loop to be attached to the tip of the wiring tool is attached by providing hooks at both ends of a fixed length rope or string, and hanging each hook on a loop-shaped ring provided in advance at the tip of the wiring tool. The cable removal tool according to claim 2 or 3, wherein the cable removal tool is characterized.